题目内容

The main adsorptions of aldehyde group are at 1750~1700 cm-1, 2820 cm-1, and 2720 cm-1.

查看答案

搜索结果不匹配？点我反馈

更多问题

The commonly used light source in infrared spectrophotometer is hollow cathode lamp.

O2 has infrared activity and can produce infrared absorption peaks.

In the precipitation titration method, the indicator used by the Volhard method is ( ).

A. K2CrO4
B. NH4Fe(SO4)2
C. adsorption indicator
D. to judge

To make c(S2-) 1×10-8 mol/L, the pH value of H2S saturated solution should be controlled as ( ).[Ka1Ө(H2S)=8.9×10-8，Ka2Ө(H2S)=1.2×10-13]

A. 7.02
B. 13.89
C. 5.99
D. 7.50